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4 years ago

Indicate if each bottle contains an element or a compound

Chemistry

1 answer:

Dmitry_Shevchenko [17]4 years ago

5 0

Bottle 1 is a compound bottle 2 is element bottle 3 is a element bottle 4 is a element

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sound travels 1,500 m/s through water at 25 degrees celciesunder these conditions how long would it take to travel 300m

lesya [120]

Answer:

$v = s \div t$

$t = s \div v$

$t = 300 \div 1500 = 0.2s$

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3 years ago

An object with a height of 0.3 meter is placed at a distance of 0.4 meter from a concave spherical mirror. An image with a heigh

Sophie [7]

We can use the magnification equation for this problem.

Magnification equation:

hi/h0 = di/d0

Where in hi : image size, h0 : object size, di : image distance, d0 : object distance from mirror

So plugging in the given variables we will have the corresponding equation

0.1 m / 0.3 m = di / 0.4 m

di = 0.1333333m

The generated image of the object is located 0.13 meters or 13 cm away from the mirror

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3 years ago

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A faulty version of the CFTR gene causes the disease cystic fibrosis (CF). This gene is found in 1 in 25 Caucasians in the Unite

Papessa [141]

Answer:

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3 years ago

En la reacción I2(g) + Br2(g) « 2 IBr(g), Keq = 280 a 150°C. Suponga que se permite que 0.500 mol de IBr en un matraz de 1.00 L

love history [14]

Answer:

P IBr: 15.454atm

I₂: 0.923 atm

P Br₂: 0.923atm

Explanation:

Basados en la reacción:

I₂(g) + Br₂(g) ⇄ 2 IBr(g)

La constante de equilibrio, Keq, es definida como:

$Keq = \frac{P_{IBr}^2}{P_{I_2}P_{Br_2}}$

Se cumple la relación de Keq = 280 cuando las presiones están en equilibrio

Usando PV = nRT, la presión inicial de IBr es:

P = nRT / V; 0.500mol*0.082atmL/molK*423.15K / 1.00L = 17.3 atm

Siendo las presiones en equilibrio:

P IBr: 17.3 - 2X

P I₂: X

P Br₂: X

Donde X representa el avance de reacción.

Remplazando en Keq:

280 = (17.3 - 2X)² / X²

280X² = 4X² - 69.2X + 299.29

0 = -276X² - 69.2X + 299.29

Resolviendo para X:

X = -1.174 → Solución falsa. No existen presiones negativas

X = 0.923 → Solución real

Así, las presiones parciales en equilibrio de cada compuesto son:

P IBr: 17.3 - 2X = 15.454atm

P I₂: X = 0.923atm

P Br₂: X = 0.923atm

3 0

3 years ago

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An ideal gas is kept in a 10-liter [L] container at a pressure of 2.5 atmospheres [atm] and a temperature of 310 kelvin [K].

Hatshy [7]

Answer:

5 L.

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) = 10 L

Initial pressure (P1) = 2.5 atm

Final pressure (P2) = 5 atm

Final volume (V2) =.?

Since the temperature is constant, we shall apply the Boyle's law equation to determine the new volume of the gas. This can be obtained as follow:

P1V1 = P2V2

2.5 × 10 = 5 × V2

25 = 5 × V2

Divide both side by 5

V2 =25/5

V2 = 5 L

Thus, the new volume of the gas is 5 L

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3 years ago